Chapter 569: Last hope

,
Of course Xu Mang knows what these people are doing. He just wants to see the strength of these people. This is a sharp glance, let alone... It's really not very good. It is full of dense rows of calculations. , But it was empty in the end.
It doesn't seem to be...
"you do not understand..."
"This is a question of relativity cosmology." Tong Min said with a smile: "Did you help me with a handful of cumin?"
"It is necessary!"
"The soul of barbecue lies in cumin and iced fat boy happy water." Xu Mang said with a smile: "Wait a minute...help you get some bottles of fat boy happy water. If two ladies need sugar happy water or Sugar-free happy water?"
"..."
"..."
This guy...very humorous, full of girly.
"zero COLA!"
"I also want!"
The two returnee girls said with a smile to Xu Mang.
but...
This aroused Yang Xiaoman's vigilance. My old lady, I was sitting on the side. This idiot actually showed courtesy to others. What does it mean?
"Ahem!"
"The weather is so hot... my mouth is a little thirsty." Yang Xiaoman coughed slightly, and said to Xu Mang intentionally or unconsciously: "I want to drink zero Coke... I don't know who would help me get it."
Xu Mang walked to Xiaoman, glanced at Yang Xiaoman with a look of expectation, and said angrily: "The cold box is right next to you, and I just bend over, I don’t want to take it. Tell me about yourself... are you lazy?"
Yang Xiaoman: @#￥%...!
I...
Whoops,
Mad!
However, Xu Mang’s mouth is not forgiving, but his body is very honest. Among the many cold drinks, he picked a bottle of Coke that is not very cold and handed it to Yang Xiaoman’s hand. He said seriously: "Drink less cold. It will accumulate and become sick in the future, and the pain will not kill you."
Yang Xiaoman was angry and warm, gave a vicious glance, then opened the bottle cap with joy, let alone... the temperature is just right, this is the temperature of love.
"I'm coming!"
"Ice Coke is here!" Xu Mang smiled and ran to the four international students, and began to distribute things seriously.
"Thank you!"
"Thank you so much."
"..."
Thanks to the four of them, especially those two girls, who have a special affection for Xu Mang, sometimes feelings...I’m not sure, just like Xu Mang and Yang Xiaoman, because of the gravy inside the buns, they both left. Together, I have to hug and sleep every night.
Although Xu Mang was wearing a hat and a pair of polarizers at this time, he could vaguely feel handsome from the outline.
"Ugh?"
"Your name...what's your name?" Liu Yan asked.
"I?"
"You call me Xiao Xu." Xu Mang smiled and said, "Can you show me your calculation process? I like the universe... I am an astronomy enthusiast, so I chose physics. Department, major is theoretical physics."
"???"
"???"
"???"
Can't see it!
This guy turned out to be engaged in physics or theoretical physics!
and many more,
Isn't this just right?
"Xiao Xu?"
"Unexpectedly, you still study theoretical physics, so you should know the theory of relativity very well?" Tong Min asked.
"Okay."
"Let me take a look first?" Xu Mang is really curious about their calculations. If these four people fail to calculate, they will not be able to solve the problem of the fugacity of oxygen outside the system. The problem of oxygen fugacity in exoplanets requires a lot of comparison. Calculation, the intensity is very high.
"give!"
That Liu Yan generously handed all the manuscripts to Xu Mang, but Lu Bo was a bit dissatisfied with this. For such an important thing, he gave it to him. In any case, it is the result of his own knowledge. This... It's too childish.
But he wanted to refuse, it was too late, Xu Mang was reading their calculations.
at first,
Thinking that it was just a calculation problem, it turned out that it was more than a calculation problem, and the whole direction of thinking was also a problem. They used the wrong formula to calculate the function relationship between the ability of the expanding universe, momentum and time that they needed to solve!
Xu Mang returned the manuscript disappointedly, and said calmly: "You... used the wrong formula."
"This problem requires the Robertson-Walker metric to describe space-time." Xu Mang said helplessly: "Get the non-zero component from the formula, and then use the geodesic equation to calculate, and finally get the mental momentum and basic momentum, including energy."
Words fall,
The few people present were surprised and looked at Xu Mang in disbelief.
"you..."
"Did you analyze it so quickly?" Tong Min asked in horror: "Just... just glance at our calculation process?"
"Yes indeed!"
"In fact, this question is quite simple." Xu Mang said with a smile: "After all, I am studying theoretical physics, and relativity and quantum mechanics are my majors. It is not difficult to get results."
"give!"
Xu Mang submitted this manuscript to the girl Liu Yan.
wrong!
This is not the case!
This theory of relativity is actually different from cosmology of relativism. If this guy is purely engaged in theoretical physics, he would not be able to come into contact with such profound issues, including the Robertson-Walker metric. How did he know this?
Seeing Xu Mang's departure, the two astrophysics students were confused and they felt that they had seen a monster.
"he..."
"It's different!"
"It's not like an ordinary college student." Liu Yan said seriously: "Analyzing the cause of the problem in such a short time, this is definitely not something ordinary students can do. Have you seen such a person?"
Tong Min and Lu Bo shook their heads.
"Forget it..."
"Maybe it's luck." Tong Min smiled bitterly: "Then...the second question the professor sets us up is to suppose that the early universe is composed of non-interacting particles with zero mass, and they are only affected by gravity. .."
at this time,
Xu Mang walked up to Xiaoman with a disappointed look on his face, and sat on the chair without saying a word.
"Ugh?"
"What's wrong?" Yang Xiaoman asked caringly: "I was still happy, why suddenly...it wilted?"
"Ugh..."
"I wanted these four people to help me solve the problem of oxygen fugacity outside the department, but these people's abilities are not good." Xu Mang said helplessly: "Computer skills are in a hurry, and professional skills are also problematic, of course. .. Limited to those two boys."
"Those two girls aren't counted?" Yang Xiaoman gave a white look and hurriedly said: "I want to eat corn...with a little hoisin sauce on it."
"Oh..."
Xu Mang obediently ran to the side of the grill and grilled the corn for the Queen.
at this time,
The four are solving the hypothesis that in the universe, the temperature of the thermal equilibrium depends on time, and the professors Tong Min and Lu Bo need to let the two calculate the dependence.
Confused...
Completely confused!
Fortunately, the four of them successfully figured out that the photon gas is in thermal equilibrium at time t. According to Planck’s blackbody radiation theory, the photons in the volume V(t) with frequencies between v and v+dv number.
but...
Because the frequency will move, the volume will expand, and how to calculate this process is basically difficult for the four people present.
"It's over..."
"This has completely entered the confused stage." Tong Min said helplessly: "I found that this professor was deliberately correcting us... This question is too sharp."
"I think so..."
"This amount of calculation is quite large. To tell the truth... I am a graduate student in the Department of Mathematics, but... I can't even figure it out." Liu Yan smiled bitterly: "Oh... I said you two, do you usually offend Professor, I guess it embarrass you?"
"Don't be nonsense!"
"We are usually very honest, I think... this professor deliberately mischievous, I said... Why did we call the two of us to the office alone? The reason is here!" Tong Min said angrily: "This is deliberately not letting us graduate!"
"impossible?"
"People...if you have no grievances or hatreds, why don't you two graduate?" Zhao Pengpeng asked.
At this time,
Lu Bo, who has been silent, said: "Because... this professor discriminates against Chinese people."
Words fall,
The two girls stopped talking. There is a lot of discrimination in the United States, especially in the field of higher education. Professors in many famous schools discriminate against Chinese and Asian students. Many schools would rather admit white blacks than Asians, especially It is from China.
Therefore, the Huaguo students who want to enter the Ivy League prestigious schools basically have to far surpass everyone in their grades.
But that's it,
I often don’t invite professors to see me.
"Ugh..."
"Actually I regret going abroad to study." Liu Yan said helplessly: "I knew...I stayed in China, but unfortunately my parents didn't agree. I must be allowed to go abroad. I also wonder...Going abroad is so important. ?"
"I remember...Professor Xu has never studied abroad, and he has not yet become a top scientist in the world, although..." Liu Yan thought of her professor being stomped by Xu Mang at that time, showing a helpless and funny expression. : "Although they are notorious, they are indeed amazing!"
Xu Mang,
Professor Xu,
It is true that the reputation in the American academic circle is not very good. It is said that they specialize in cheating Europeans and Americans, but they have this strength.
"Ugh?"
"Either... ask Xiao Xu for help?" Tong Min said, "Maybe Xiao Xu has this ability?"
"..."
"..."
"..."
Not to mention,
This is indeed a chance!
Although I don't know how that guy solved the first problem, his strength no longer needs to be explained.
"I'll find him!"
Liu Yan has a good impression of Xu Mang. The main reason is that he is more attentive and gentle with people. The most important thing is... He looks handsome, and is about the same as the author of the Internet, Taibai Mao, who is a good looking guy!
Words fall,
Liu Yan hurriedly got up and ran to Xu Mang's side under Yang Xiaoman's gaze.
"Hello?"
"Handsome... are you free?" Liu Yan asked.
"What's the matter?" Xu Mang was roasting the corn and asked with a confused look: "Is there anything I can do to find a handsome guy?"
"Uh..."
"Can you help us solve a few problems?" Liu Yan smiled and said, "It's those about relativity cosmology."
"Oh..."
"Wait for me to finish roasting these corns." Xu Mang's current thoughts are all on the corn, just now... he vaguely noticed a trace of murderousness, and glanced at Xiaoman secretly, and found that her face was full of jealousy Two words.
moment,
Xu Mang handed the corn coated with hoisin sauce to Xiaoman's hand, then leaned close to her cheek and kissed him softly, "I'll help some young people answer their questions."
"Ok!"
"Go and come back quickly." Yang Xiaoman said shyly.
but,
On the other side, Liu Yan and Zhao Pengpeng are very sad ~ EbookFREE.me~ It is a pity that the famous grass has a master.
"Come on!"
"Let me see if I encountered a problem." Xu Mang smiled and came to the four of them, and asked curiously: "What about the problem?"
"give!"
Liu Yan handed the tablet to Xu Mang.
moment,
After getting the manuscript, Xu Mang took a closer look, and his brows gradually wrinkled together.
"..."
"..."
"..."
Seeing Xu Mang's expression, Tong Min and Lu Bo couldn't help becoming nervous. This guy is their last hope...Don't say no!
......